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On optical quantification of cavitation properties

: Borchert, Stefan; Kröger, Willfried; Höhne, Stephan; Damaschke, Nils Andreas; Zhou, Zhiliang


Ohl, Claus-Dieter (Ed.) ; Agency for Science, Technology and Research -A*STAR-, Institute of High Performance Computing -IHPC-; Nanyang Technological University Singapore; National University of Singapore:
8th International Symposium on Cavitation, CAV 2012. Proceedings : 13 - 16 August 2012, Singapore
Singapore: Research Publishing Services, 2012
ISBN: 978-981-07-2826-7
ISBN: 981-07-2826-3
International Symposium on Cavitation (CAV) <8, 2012, Singapore>
Fraunhofer IGD ()
measurement; image segmentation; image processing; Business Field: Visual decision support; Research Area: Confluence of graphics and vision

This paper investigates quantitative cavitation characterization. In this context we propose shadow imaging to determine cavitation thickness and tip vortex volume. We propose a laser adjustment for absolute calibration and address cavitation extent by means of image processing. We present advantages and disadvantages of automatic processing with regard to our proposed techniques. Our main focus is on the novel cavitation thickness and tip vortex occurrence processing. Due to turbulent fluctuations all used techniques provide statistical results. The accuracy of single measurements mainly depends on camera resolution, aberrations in the optical path, illumination and optical access.